Question

What is an indirect proof?

A. Indirect proof requires you to prove that all but one of a set of possible alternatives is true.

B. Indirect proof requires you to prove that all possible alternatives is false.

C. Indirect proof requires you to prove that all but one of a set of possible alternatives is false.

D. Indirect proof requires you to prove that all possible alternatives is true.

Answer 1

i think its c not positive

Answer 2

i would say B

if we want to prove statement X

and we have the set of all possible alternatives

(Y1,Y2,Y3...)

if no Y is true then X must be true

Answer 3

Indirect proof is a type of proof in which a statement to be proved is assumed false and if the assumption leads to an impossibility, then the statement assumed false has been proved to be true.

Answer 4

http://en.wikipedia.org/wiki/Indirect_proof

Answer 5

ah yes indirect proof = proof by contradiction